Relative Content

Tag Archive for javascriptreactjsarrays

TypeError: Cannot read properties of undefined (reading ‘map’) react.js

import React, { Component } from ‘react’; import Like from ‘../common/like’; import TableHeader from ‘../common/tableHeader’; import TableBody from ‘../common/tableBody’; class MoviesTable extends Component { columns = [ {path: ‘title’, label: ‘Title’}, {path: ‘genre.name’, label: ‘Genre’}, {path: ‘numberInStock’, label: ‘Stock’}, {path: ‘dailyRentalRate’, label: ‘Rate’}, {key: ‘Like’ , content: movie => (<Like liked={movie.liked} onClick={() => this.props.onLike(movie)}/>) }, […]

Dynamically display images/icons/videos in react js?

I noticed when I serve the build and the page was on root ‘/’ the images load perfect but once I branch off to ‘/projects/1/1’ it becomes shaky. for some reason, only one image works perfect when it branches off and it was a data:imagebase64 type png (so then i tried to make all the images base64(couldn’t), most are static/media type data). But to me , the issue is the url( / vs /project/1/2) since to test i used the same images in the root ‘/’ in the ‘project/1/1/’. it works perfect in dev.

The strange behavior of the array (shadow copy? capturing an old version of the array/state? magic?)

I’ve simplified my React component to focus on a strange issue I’m encountering. My Colosseum component manages a queue of fighters, and each pair of fighters is supposed to fight in an “Arena”. The problem is that after each fight, the same fighters are selected again, causing an infinite loop. I’ve tried moving the queue to a useRef, but it made things worse (the queue somehow doubled, even though there’s no code to duplicate it).

How to Dynamically Compare Data from Two Arrays Efficiently

I’m working on a project where I need to compare one array of objects against another. One of the arrays may or may not contain data for each object. It depends on the input, so I need to be able to dynamically compare the two. The first array contains user information:

Indexing issue in JS Aarray

let cararr = [‘bmw’,’suzuki’,’volvo’,’mazda’] let arrvalue=cararr.push(“tesla”); console.log(arrvalue); The output is 5 why ?? total length of cararr is 3 if push one more value it should be 4 ! I tried solve this but did’nt get correct answer can anybody have right anser for this javascript reactjs arrays New contributor Mohibullah is a new contributor […]

Carousel / slider cloning issue

I am trying to create a carousel that accepts children, then maps over those children to display a slider / carousel that is able to loop items fluidly if clicking next and on the last child a clone of the first child is inserted after and the carousel should go to the newly created index. THen of course after 300ms it will seemlsy go to the 0 index child and looping continues. The same for when hitting previous except the last child is cloned and placed before the first item in the carousel. I have the items cloning but clicking next or previous does not work with moving to the cloned elements.